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Method and device for analyzing harmonic discharge and absorption ratio based on Riemann integral

An analysis method and harmonic technology, applied in the field of harmonic exhaust and absorption ratio analysis based on the Riemann integral, can solve the problems of staying and the difficulty of harmonic governance, and achieve a theoretically rigorous effect

Inactive Publication Date: 2020-02-14
江苏中凌高科技股份有限公司
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Problems solved by technology

However, this method is still in the stage of over-limit statistics and event alarm, which makes it difficult to carry out subsequent harmonic control. After the monitoring data is obtained, manual intervention is required to perform harmonic analysis and obtain information such as reports.

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  • Method and device for analyzing harmonic discharge and absorption ratio based on Riemann integral
  • Method and device for analyzing harmonic discharge and absorption ratio based on Riemann integral
  • Method and device for analyzing harmonic discharge and absorption ratio based on Riemann integral

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the embodiments.

[0027] The purpose of this embodiment is to provide a method and device for analyzing the proportion of harmonic exhaust and absorption based on the Riemann integral, so as to realize the analysis of the proportion of harmonic exhaust and absorption at the monitoring point. The specific implementation is as follows:

[0028] S1. Collect harmonic historical data of multiple monitoring points: collect the minute-level harmonic historical data of 10 monitoring points (lines) in a 35kV substation station for one day through the harmonic monitoring device, and store them in files;

[0029] S2. Calculate the absorbed or discharged electric energy of each monitoring point: based on the harmonic historical data of 10 monitoring points, use the Riemann integral method to calculate the harmonic absorption or emission of each monitoring point;

[0030] The electrical energy absorbed or e...

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Abstract

The invention provides a method for analyzing a harmonic discharge and absorption ratio based on Riemann integral, comprising the following steps: (1) collecting harmonic history data of a plurality of monitoring points: collecting the harmonic history data of the plurality of monitoring points through a harmonic monitoring device, and storing the harmonic history data into a file; (2) calculatingabsorption or discharge electric energy of each monitoring point: calculating a harmonic absorption or discharge amount of each monitoring point by utilizing a Riemann integral method based on the harmonic historical data of the plurality of monitoring points; and (3) calculating a discharge and absorption ratio of each monitoring point: calculating the discharge and absorption ratio of each monitoring point according to the absorption or discharge electric energy of each monitoring point. The invention also provides a device for analyzing a harmonic discharge and absorption ratio based on Riemann integral, which is used for completing the realization of the method and displaying and exporting an analysis result. The method and the device of the invention can quickly obtain the harmonic discharge and absorption conditions in a regional power grid, and provide an effective reference basis for distribution and flow direction analysis of the harmonic.

Description

technical field [0001] The invention relates to the field of harmonic analysis of power systems, in particular to a method and device for analyzing the proportion of harmonic exhaust and absorption based on Riemann integrals. Background technique [0002] With the rapid growth of UHV DC, wind power photovoltaics, electrified railways and other nonlinear loads, the power quality problems of the power grid are increasing. In this context, power quality problems have received extensive attention. Harmonic pollution has always been the most prominent and most concerned power quality problem. Therefore, the key to solving power quality problems is to solve the harmonic problem of the power grid. [0003] To solve the harmonic problem, we must first find out the distribution and flow direction of the harmonics in the power grid. At present, monitoring / testing is the only means to fully control the status of harmonics in the power grid. The common method is to measure on-site with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16
CPCG01R23/16
Inventor 张海江张建宇陈龙杨立柏玉墙谢斌鲁峰
Owner 江苏中凌高科技股份有限公司
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